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Removal of impurities in Oxide Bonded Silicon Caribde
- Oct 12, 2018 -

Oxide-bonded silicon carbide are used in a wide range of applications in the petroleum, chemical, automotive, mechanical, and aerospace industries. Therefore, there is an urgent need to continuously improve manufacturing techniques and reduce production costs while improving the performance of oxide-bonded silicon carbide .


At the same time, in order to achieve low-temperature sintering of oxide-bonded silicon carbide, energy consumption can be significantly reduced, production costs can be significantly reduced, and industrialization of products can be promoted. Compared with other structural ceramics, silicon carbide raw materials are rich in sources and have many preparation methods. They can adapt to various requirements of different working conditions, and are the most likely to form industrial scale ceramic engineering ceramics besides alumina.


For the impurities in oxide-bonded silicon carbide , people usually choose to remove the acid-base method. The pickling is usually to treat the silicon carbide particles with sulfuric acid under heating conditions, the main purpose is to remove the metal in the silicon carbide. Iron, iron oxide, magnesium, aluminum and other impurities. The alkali washing also treats the silicon carbide particles with NAOH under heating conditions, and the main purpose is to remove the free silicon, silica, etc., so as to increase the content of silicon carbide and strengthen its silicon carbide content.